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* دانشیار گروه اقتصاد، دانشکده مدیریت و اقتصاد، دانشگاه صنعتی شریف
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** کارشناس ارشد مهندسی سیستمهای اجتماعی و اقتصادی، دانشکده مدیریت و اقتصاد، دانشگاه صنعتی شریف (نویسنده مسئول).
چکیده
یکی از عوامل ریسک داراییهای مالی قابلیت نقدشوندگی این داراییها است و شناسایی عوامل اثرگذار بر نقدشوندگی، به پیشبینی وضعیت نقدشوندگی سهام و در نتیجه مدیریت ریسک سهام کمک میکند. هدف پژوهش حاضر، شناسایی همین عوامل در بورس تهران است. دادههای مورد مطالعه، مربوط به 48 شرکت بورسی، طی سالهای 1392-1388 هستند. پس از تخمین ضرایب این عوامل در رگرسیون، به ازای هر یک از سهام، معناداری میانگین مقطعی ضرایب نشان میدهد که نقدشوندگی سهام یک چرخه هفتگی و ماهانه را دنبال میکند. بازده سهم و بازده بازار، حجم معاملات و تلاطم بازده سهم و بازده بازار عوامل اثرگذار بر نقدشوندگی سهام هستند. به علاوه عکسالعمل نقدشوندگی سهام به بازده مثبت و منفی سهم متقارن نیست و اثر بازده منفی بر نقدشوندگی، بیشتر از بازده مثبت است. نتایج نشان میدهد که شوکهای منفی بازده سهم و بازده بازار بیش از شوکهای مثبت بر نقدشوندگی سهام اثرگذارند.
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